Koren Specific Technique

Koren Specific Technique, known throughout chiropractic as KST, is an analysis protocol built on a yes or no question. The practitioner challenges a structure, reads the answer at the back of the skull, and corrects whatever the answer names. Tedd Koren assembled it between 2003 and 2005 from three existing sources. Its sharpest claim is that the patient should be analyzed and corrected in the posture where the problem happens. That means standing, seated, bending or mid swing, rather than lying flat on a table.

Koren Specific Technique came out of ten years in which Tedd Koren could not find an answer for his own body

Koren was one of chiropractic’s best known publishers before he founded a technique. He took a B.A. in communications from the University of Miami in June 1972 and a Doctor of Chiropractic from Sherman College of Straight Chiropractic in March 1977, graduating magna cum laude and class valedictorian. In 1978 he helped establish the Pennsylvania College of Straight Chiropractic, teaching there through 1980. He founded Koren Publications in 1987, which has since distributed over sixty million patient education brochures. His curriculum vitae dates KST to 2003 onward.

The method started with an injury. A tall laminate cabinet, standing on its side after a house move, toppled onto him when he closed a door. He took a concussion and nearly lost three fingers. Within days the use of his hands began to go, and he already carried a lumbosacral disc complaint of 25 years or more. By his own account he spent about ten years seeing 40 to 50 practitioners across the United States.

The turn came in Key Biscayne, Florida, where a colleague named Alan Creed worked on him with adjusting instruments. Koren ordered the equipment and began experimenting on himself. What he built combined three things that already existed. First, the challenge procedure of Directional Non-Force Technique, developed by Richard Van Rumpt. Second, the occipital drop and the posture work of Lowell Ward’s Spinal Column Stressology. Third, a multi-thrust instrument to deliver the correction.

The first Koren Specific Technique seminar ran at the end of May 2005

Koren spent more than a year adjusting chiropractors at his own philosophy seminars before he would teach the method. The first unplanned demonstration came in Abingdon, England, at the McTimoney College of Chiropractic, where he had two full days of lecture time. The first formal KST seminar followed at the end of May 2005. The name was the last decision, chosen after several candidates including one whose acronym ruled itself out.

The occipital drop gives Koren Specific Technique a yes and a no, and Lowell Ward found it first

The indicator is a change at the back of the skull. The practitioner runs both hands down over the occiput and mastoid region and compares the two sides. One side appearing to sit lower than the other reads as a yes. Even sides read as a no. Koren credits the finding to Lowell Ward, a chiropractor in Long Beach, California. Ward coined the term occipital drop and used it as a binary device inside Spinal Column Stressology, a system that recorded 40 measurements of spinal landmarks per patient. Koren studied with Ward for several years before building anything of his own.

The region those hands read is the densest proprioceptive real estate in the body. Kulkarni and colleagues counted muscle spindles in the suboccipital muscles of human fetuses in 2001 (Neurol India 2001). They found 242 per gram in obliquus capitis inferior, 190 in obliquus capitis superior and 98 in rectus capitis posterior. Peck, Buxton and Nitz had already proposed in 1984 that small muscles paired with much larger ones act as kinesiological monitors rather than movers (J Morphol 1984). They generate feedback out of all proportion to their mass. That architecture is covered in Muscle Spindles and Proprioception.

Koren Specific Technique runs three steps: challenge, check, correct

The challenge is a light directed push, pull or stroke against one structure, or an instruction to hold a position or a thought. The check is the occipital drop. The correction goes only where a yes was found, and the drop is rerun to see the yes become a no. Anything in the structural system can be challenged. The official description names 4 valid postures for the whole loop: standing, sitting, lying and the position of injury.

The occipital drop differs from the DNFT leg check and the Applied Kinesiology muscle test in what it costs to ask

All 3 methods ask the body a binary question. The price of each question decides how the rest of the technique is built.

An indicator muscle tires. Applied Kinesiology reads a muscle held against the practitioner’s resistance. Every question spends a contraction, and readings degrade over a long session. The DNFT reactive leg does not fatigue the same way, but it has a floor. Christopher John treats a pull-up of half an inch, about 13 millimeters, as the minimum readable answer, and the patient lies prone in a modified shoe. Koren’s argument for the occipital drop is that it costs almost nothing. No muscle is loaded, so nothing fatigues, and he holds that the check can be run dozens of times a minute.

The second difference matters more. A leg check needs a patient lying down. A muscle test needs a free limb and a stable stance. The occipital drop needs only the back of the head, which survives any posture the patient can hold. That property is what lets KST take the analysis off the table, and everything distinctive about the technique follows from it.

The third difference is what the question can be about. DNFT challenges a structure along a line. Applied Kinesiology localizes a site. KST asks about structures too, then asks which posture this person should be examined in at all. The subject of that question is the state of the system rather than a part of it.

Koren Specific Technique checks the patient in the posture where the problem happens, and Koren calls it the posture of subluxation

Koren’s term is the posture of subluxation, abbreviated POS. He states the claim without qualification: a subluxation present in one posture may not exist in another. He inherited the idea from Ward, who had a patient whose sciatic pain appeared only when she sat. Her standing radiograph looked unremarkable, so Ward broke his own routine and filmed her seated. The seated film showed reversed curves. Ward made that comparison on more than 1,000 patients. Koren read close to a thousand sets of those standing and seated films while studying with him.

Koren treats the table as a constraint rather than a neutral vantage point. Patients are rarely hurt lying down. They are hurt standing, twisting and lifting, so the analysis should meet them there. The postures he teaches are ordinary and specific. Bending forward or back, crossing the legs, a foot up on a chair. Climbing the small step stool he keeps in the office. Sitting on a motorcycle, holding a guitar, or moving through a golf swing one frame at a time until the drop appears. He tells patients before they leave, “make it hurt.”

Posture in Koren Specific Technique includes emotional and cognitive states

Koren extends the term past physical position. A patient cleared in the office can think about a divorce or a car crash and present new findings within seconds. He checks and corrects them while they hold that thought. He credits Scott Walker, founder of Neuro-Emotional Technique, with establishing that an emotional memory reproduces a physical pattern. The same logic covers cognitive load. Where the trouble shows up while reading, the posture is reading, so the book stays in the patient’s hands during the check. Where it shows up while writing, the posture is writing. Koren also asks the body which posture is the right one, and asks whether the patient knows. He reports that athletes name their worst position on the field immediately.

Upright imaging found what Ward said it would find

Weishaupt and colleagues imaged 30 patients with chronic low back pain in a positional MRI scanner, comparing supine images against seated flexion and seated extension across 152 nerve roots (Radiology 2000). Nerve root contact rose from 34 instances supine to 62 in seated flexion and 45 in seated extension. Deviation went from 10 supine to 13 in seated extension. Compression appeared in one patient, and only when that patient sat in extension.

The load numbers run the same direction. Wilke and colleagues telemetered pressure from a transducer in the L4 to L5 nucleus of a 45 year old volunteer (Spine 1999). They recorded 0.10 MPa lying supine against 0.50 MPa relaxed standing and 0.46 MPa sitting unsupported. Standing bent forward reached 1.10 MPa, and lifting 20 kg with a rounded back reached 2.30 MPa. A supine spine carries one fifth the disc pressure of a standing one.

Koren published on posture 13 years before he taught the technique

Koren and Rosenwinkel ran 40 patients through four radiographs each plus the Minnesota Multiphasic Personality Inventory, then built general linear models predicting personality measures from spinal and postural measures (Int J Psychosom 1992). Several models reached significance. The abstract asks whether changing posture can affect personality, and whether emotional states can alter posture. That question, published in 1992, is the one KST would be built to ask at the bedside 13 years later.

Koren Specific Technique corrects with an ArthroStim, 12 to 14 thrusts a second where the Activator delivers one

The correction is usually made with an ArthroStim, a handheld multi-thrust instrument built by IMPAC, Inc. of Salem, Oregon. The manufacturer specifies 12 to 14 high velocity thrusts per second in continuous mode. Four frequency settings cover single thrust, 3, 6 and 12 cycles per second (IMPAC product announcement). The instrument was cleared through the FDA 510(k) pathway on July 15, 1994 under number K930431, which establishes substantial equivalence to an instrument already marketed rather than approval. The mechanism is a short stroke recoiling thrust. Interchangeable styluses cover contacts from the upper cervical spine to the extremities. IMPAC states the design activates mechanoreceptors and proprioceptors without recruiting nociceptors. Koren teaches that KST corrections can also be delivered with the fingers.

The contrast with the Activator Method is structural rather than cosmetic. An Activator banks spring energy and spends it in a single impulse lasting about a millisecond, with the Activator IV producing mean peak forces near 174 N at maximum. An ArthroStim spends its energy as a train. At 12 cycles per second the repetition rate sits inside the 2 to 100 Hz band where mechanoreceptors respond. The two instruments are not delivering different amounts of the same thing. They are delivering different information.

Koren Specific Technique goes wherever the drop sends it, including the skull, the jaw and the hyoid

Koren lists the whole structural system as available: the spine, the skull and its sutures, the pectoral and pelvic girdles, the ribs, the sternum, the discs and the extremities. Contacts are taken on the hyoid, the temporomandibular joint and the individual cranial bones. The sphenoid gets particular attention, the butterfly shaped bone behind the eyes whose central depression holds the pituitary gland. Koren repeats a rule he credits to Van Rumpt. Cranials that are not corrected will let the cervicals go again, and ribs that are not addressed will let the thoracics go again.

Reaching the coccyx is not an eccentricity of the method. The spinal dura continues below the cord as the filum terminale and anchors to the first coccygeal segment. The membrane the upper cervical techniques reach at the foramen magnum is continuous with tissue at the far end of the spine.

The order of correction is set by the body, not by a scan

This is where KST diverges most visibly from the other instrument techniques. The Activator runs a fixed scan through roughly 20 stations from the feet to the occiput, clearing caudal segments before rostral ones. KST has no fixed route. The practitioner asks the drop what to correct first and follows the sequence it gives, which moves up and down the body and doubles back. Each visit re-asks the question rather than repeating the last visit’s list.

Where Koren Specific Technique meets the Unified Model of Tone

KST is an analysis protocol with a strong claim about where analysis should happen. The Unified Model of Tone is a claim about what is being analyzed. The overlap is tight, because Koren reached the model’s position on state dependence from the office rather than from theory.

Load is part of tone, so a patient lying down is a different system

Our position is that what an input does depends on the state receiving it. Load is a foundation of tone rather than a background condition. A body under gravity, holding itself upright, runs different control from the same body supported by a table. Disc pressure is five times higher standing than supine. Heart rate rises by roughly 10 beats per minute from supine to sitting and by roughly 30 from supine to standing. That was measured across 175 healthy women and 176 healthy men (Int J Cardiol 2019). Autonomic state is covered further in Heart Rate Variability.

Koren holds that subluxations are posture specific. We read that as a claim that the finding is state dependent, which is the model’s own position in clinical language. A finding taken supine is not a more objective version of the finding taken standing. It is a finding about a different state, and the state the patient lives in is the one they walk out in.

The body maps itself by moving, so a still patient reports a smaller map

The model holds that the body localizes itself by moving and cannot form an accurate map holding still. Position sense is generated by loaded, moving tissue. The suboccipital spindle counts above show how much of that machinery is packed into the region KST reads. Putting a patient into the golf swing, onto the step stool or back on the motorcycle restores the load and the movement that produce the signal. The still supine patient is not giving a cleaner reading. They are giving a quieter one. The same argument is developed in Movement.

A binary question is an input, and asking it under load changes what comes back

Registration in the model sits inside the loop it reports on, so no sample of the body’s state leaves that state untouched. A challenge is already a small input, and part of the correction has been delivered by the time the answer arrives. What is specific to KST is the shape of the question and the conditions under which it is asked.

A binary question carries almost no dose. It is a light directed stroke and a hand passed over the occiput. A practitioner can afford to ask it hundreds of times in a visit where a muscle test would have run out of muscle. The analysis becomes a search rather than a survey. The second condition matters more. Because the question can be asked while the system is loaded, the answer reports the loaded state. DNFT and Applied Kinesiology unload the patient to read them, and on our account that is not a neutral act. It is a change in the variable being measured.

Correspondence over magnitude, at 12 thrusts a second

Specificity in the model is correspondence between the structure of an input and the pattern the body is holding. Magnitude sits on a separate axis. Force beyond what the system needs to receive the message degrades the message. The ArthroStim removes almost all of the magnitude and replaces it with repetition, which is a bet on information rather than on displacement. Toftness and DNFT make the same bet with different hardware. The model reads all three as inputs into one regulated system arriving at different doors.

What Koren holds about mechanism, and what we hold

Koren is explicit that KST is empirical and vitalistic rather than mechanistic. On his account the practitioner does not decide what the body needs. The body is asked, and the mechanism may never be fully known. He holds that the work rests on results, not on understanding the mechanism. Our position is the opposite in emphasis. We hold there is a single regulated variable, that it is measurable, and that naming the mechanism is the work.

Both positions are stated in full. The reading that holds them together is the model’s no lynchpin position. There is no single governing bone or segment, so many places exist where an input can reach the whole system. An empirical protocol that asks the body where to go will keep finding real doorways whether or not anyone has named the mechanism. Koren’s move away from the upper cervical exclusivity taught at Sherman is what that looks like from inside a practice. A single lynchpin model has to explain away the 33 techniques in this index. Ours does not.

What the model predicts about Koren Specific Technique

Three predictions follow, all stated as the model’s own and all measurable with existing equipment.

The posture of analysis changes the finding. The Unified Model of Tone predicts that sites identified by challenge in the posture of complaint differ systematically from sites identified supine, in the same patient in the same session. Record both lists before either is acted on. If the two agreed within chance, posture specificity would be false.

Posture matched correction produces the larger regulatory shift. On the model’s account, correcting in the posture of complaint moves autonomic and motor measures further than correcting the same segments supine. Heart rate variability, resting paraspinal electromyography and foraminal dimension on upright imaging are adequate instruments. The prediction is about regulation and adaptive capacity rather than any diagnosis.

The change is bidirectional. The model does not predict better. It predicts convergence toward the person’s own midpoint. Assemble two groups on one variable, resting paraspinal tone or high frequency heart rate variability. One starts above its healthy range and one below, and half of each receives a sham matched for contact and attention. The model predicts the treated groups converge on the middle and that their spread narrows. That contrast separates an input that restores regulation from one that masks a symptom.

Koren has taught Koren Specific Technique himself since 2005, in ten countries

The work is carried by Tedd Koren Seminars and Koren Publications, Inc. of Hatfield, Pennsylvania, through korenspecifictechnique.com. Training pairs a home study foundation course, built around the KST manual, with live weekend seminars and a personal mentor. The 2026 schedule lists Marietta, Georgia on August 28 to 30 and Phoenix, Arizona on October 9 to 11. Koren still teaches personally.

His record reaches past his own seminars. He has been on faculty at Life University since 1995, taught in Tokyo from 1995 to 1998, and taught at Palmer from 1997 to 2005. He has run seminars in 10 countries. KST is taught to practitioners outside chiropractic, and Koren holds the occipital drop is universal enough that anyone can learn to read it.

Koren Specific Technique is a declared synthesis of three named sources

Koren names his sources rather than claiming originality. From Van Rumpt’s DNFT he took the challenge and the refusal to correct anything the analysis has not confirmed. From Ward’s Spinal Column Stressology he took the occipital drop and the posture work, including the radiographic comparison Ward built across 1,000 patients. From the multi-thrust instrument line he took the ArthroStim. Scott Walker’s Neuro-Emotional Technique supplied the emotional half of the posture concept.

Once the method worked, Koren read the technique literature he had ignored, including DeJarnette and Goodheart. He found he had rediscovered pieces of what they established, and treats that as confirmation. The lineage runs upstream to Sacro-Occipital Technique, where Van Rumpt spent 15 years.

How this page relates to the rest of the library

Activator Method is the single impulse instrument KST’s multi-thrust instrument is read against, and its fixed 20 station scan is the opposite of KST’s body led ordering.

Directional Non-Force Technique supplied the challenge KST runs, and its reactive leg check is the indicator KST replaced to free the patient from the table.

Applied Kinesiology asks the same binary question through a muscle held against resistance, which is what makes the occipital drop’s freedom from fatigue matter.

Toftness is the other technique here built around a handheld device and a reading taken before force is applied.

Neuro-Emotional Technique is where the emotional posture of subluxation comes from, and Koren credits Scott Walker.

The Unified Model of Tone supplies the reason posture changes the finding, by treating load as part of tone.

Muscle Spindles and Proprioception covers the receptor density that makes a reading taken at the back of the skull plausible.

Movement develops the claim that the body maps itself by moving, the general argument for analyzing a patient in the position of complaint.